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Effects of environmental and water quality parameters on the functioning of copepod assemblages in tropical estuaries

机译：环境和水质参数对热带河口co足类动物组合功能的影响

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摘要

We examined changes in the functioning of copepod assemblages with increasing pollution in estuaries, using sampling standardization of the salinity range to enable comparisons. Copepod assemblages were analyzed in four southeast Brazilian estuaries with different water quality levels and hydrodynamic characteristics over two years. We obtained mesozooplankton samples together with environmental and water quality parameters in the estuaries, every two months under predetermined salinities ranging from 15 to 25. The values of parameters, except species size, associated with the functioning of the copepod assemblages (biomass, productivity, and turnover rate) did not differ among estuaries. However, in the more polluted estuaries, the biomass and productivity of copepod assemblages of mesozooplankton were negatively correlated with concentration of pollution indicator parameters. Conversely, in the less polluted estuaries some degree of enrichment still seems to increase the system biomass and productivity, as these parameters were inversely related to indicators of improved water quality. The pollution level of estuaries distorted the relationship between temperature and the efficiency of converting energy to organic matter. In the less polluted estuaries, the relationship between turnover rate and temperature was over 70%, while in the most polluted estuaries, this relationship was only approximately 50%. Our results demonstrated that the functioning of assemblages in the estuaries was affected differently by increasing pollution depending on the water quality level of the system. Thus, investigating the functioning of assemblages can be a useful tool for the analysis of estuarine conditions. (C) 2017 Elsevier Ltd. All rights reserved.
机译：我们使用盐度范围的抽样标准化方法进行了比较，研究了pe足类动物的功能变化以及河口污染的增加。在两年的时间内，对巴西东南部四个河口的足类动物组合进行了分析，这些水质水平和水动力特性各不相同。我们在预定的盐度范围为15到25的情况下，每两个月在河口中采集中游浮游生物样品以及环境和水质参数。除物种大小外，这些参数的值与as足类动物的功能相关（生物量，生产力和周转率没有差异。然而，在污染较严重的河口中，中浮游动物co足类组合的生物量和生产力与污染指标参数的浓度呈负相关。相反，在污染较少的河口，某种程度的富集似乎仍会增加系统生物量和生产力，因为这些参数与改善水质的指标成反比。河口的污染程度扭曲了温度与能量转换为有机物的效率之间的关系。在污染较少的河口，周转率与温度之间的关系超过70％，而在污染最严重的河口，这种关系仅约为50％。我们的结果表明，取决于系统水质水平，污染的增加会影响河口组合的功能。因此，调查组合的功能可能是分析河口状况的有用工具。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2017年第15期|150-161|共12页
  • 作者

    Araujo Adriana V.; Dias Cristina O.; Bonecker Sergio L. C.;

  • 作者单位

    Univ Fed Rio de Janeiro, Inst Biol, Dept Zool, Lab Integrado Zooplancton & Ictioplancton,Predio, Bloco A,Cidade Univ, BR-21941590 Rio De Janeiro, Brazil|Univ Fed Rio de Janeiro, Museu Nacl, Programs Posgrad Zool, BR-20940040 Rio De Janeiro, Brazil;

    Univ Fed Rio de Janeiro, Inst Biol, Dept Zool, Lab Integrado Zooplancton & Ictioplancton,Predio, Bloco A,Cidade Univ, BR-21941590 Rio De Janeiro, Brazil;

    Univ Fed Rio de Janeiro, Inst Biol, Dept Zool, Lab Integrado Zooplancton & Ictioplancton,Predio, Bloco A,Cidade Univ, BR-21941590 Rio De Janeiro, Brazil;

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  • 正文语种 eng
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  • 关键词

    Estuarine pollution; Mesozooplanktonic copepods; Biomass; Productivity; Turnover rate; Southeast Brazil;

    机译：河口污染;中层lan足co足;生物量;生产率;周转率;巴西东南部;

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